Apparatus for preparing foam-like substances such as whipped cream



Oct. 6, 1953 B. HEESEN 2,654,535

APPARATUS FOR PREPARING FOAM-LIKE SUBSTANCES, SUCH AS WHIPPED CREAM 2 Sheets-Sheet 1 Filed Oct. 11, 1950 INVENTOR. Lffi. HEESE (w/mm, Ami J- mm Oct. 6, 1953 B. HEESEN 2,654,585

APPARATUS FOR PREPARING FOAM-LIKE SUBSTANCES, SUCH AS WHIPPED CREAM Filed 001;. 11, 1950 2 Sheets-Sheet 2 I i u I] H -\V/ V v INVENTOR Leonurdus Bernordlnus Heesen,

BY w I ATTORNEYS Patented Oct. 6, 1953 APPARATUS FOR PREPARING FOAM-LIKE SUBSTANCES SUCH AS WHIPPED CREAM Leonardus Bernardinus Heesen, Amsterdam, Netherlands Application October 11, 1950, Serial No. 189,634 In the Netherlands July 19, 1950 3 Claims.

This invention relates to an apparatus for preparing a foam-like substance.

If such an apparatus is intended for preparing substances, such as whipped cream, which are not constantly but periodically drawn oif, the difficulty often presents itself, that, as a result of the apparatus being out of operation between the periods of drawing off, the inlet for the compressed gas to the ascending pipe gets clogged up with the liquid flowing back from the mixing member. At the moment when the drawing off operation is to be resumed the apparatus appears to be out of order then and to deliver a substance of inferior quality.

In order to remove such a break-down a partial dismantling of the apparatus is necessary which causes a considerable delay, mostly at a moment when this is extremely awkward.

It is the object of this invention to overcome this drawback by an improved construction of the apparatus.

To this end use is made according to the invention of an apparatus comprising a closed vessel for receiving a liquid, in which vessel an ascending pipe is provided which reaches approximately to the bottom of the vessel, through which pipe the liquid kept under pressure by means of a compressed gas tank which is connected to the vessel at a point above the level of the liquid contained therein, is pressed to a mixing member with an associated discharge cock, in which mixing member the liquid is intimately mixed with a portion of the gas present in the vessel above the level of the liquid, which gas is admitted into the ascending pipe through an inlet having a controllable or constant intake, a non-return valve closing in the direction away from the mixing member being provided in the ascending pipe as well as in the compressed gas conduit discharging into said pipe, the latter non-return valve being located between the inlet controlling the rate of flow in said compressed gas conduit and the mixing member.

According to the invention the inlet determining the rate of flow in the compressed gas conduit can discharge into a chamber-like portion of the compressed gas conduit, which portion isaccessible from the outside and which can be closed.

Furthermore the invention opens up the possibility of connecting more than one mixing member with an associated discharge cock to the ascending pipe.

In order to obtain as small as possible a resistance of the mixing member(s) at an optimal mixing action thereof, it is to be recommended, that the mixing member or each of the mixing members comprise of at least one sleeve having a core fitting therein, while at least one of the walls of the sleeve or the core, turned towards each other is provided with intersecting, helical left and right-handed grooves, the left-handed grooves difiering in number and/or in pitch from the right-handed grooves. This is instrumental to the prevention of breakdowns.

The invention is illustrated hereinafter with reference to the accompanying drawing, showing an embodiment of the apparatus.

In this drawing:

Fig. 1 shows a vertical section on the line II in Fig. 2.

Fig. 2 shows a vertical section on the line IIII in Fig. 1.

Fig. 3 shows an enlarged view, partly in section, of the right hand discharge portion of Fig. 2.

Fig. 4 shows a detail view of the channels in the right hand mixing member of Fig. 2; the arrow points in the direction of flow of the mixture.

According to the drawing the apparatus comprises a vessel I, which is closed by a detachable cover 2. In the cover a fillin opening 3 adapted to be closed by a screw cap, to which a supply pipe 4 provided with a valve and a pressure gauge is connected, which supply pipe is adapted to be coupled with a compressed gas tank.

Furthermore the cover is provided with a conduit 5, while to the two extremities of the horizontal branch one or more mixing members 6 with an associate discharge cock 1, and to the vertical branch an ascending pipe 9, which reaches approximately to the bottom of the vessel and which is provided with a non-return valve 8, are connected.

To the conduit 5 a duct Ill provided in the cover 2, is connected, which duct is provided with a non-return valve II in a widened portion of said duct. The rate of flow in the conduit 5 is determined by the narrow inlet port [2, which discharges into a chamber-like portion [3 of the conduit 5, which portion I3 is closed by a screw cap [4 and which is accessible from the outside after the removal of said cap.

When the apparatus is used the vessel I is partly filled with a liquid, for example cream, and after closing the vessel compressed gas is admitted above the level of the liquid I5 through the supply pipe 4.

When the discharge cock I of one of the mixing members 6 is opened the compressed gas will press the liquid via the ascending pipe 9 and the conduit 5 to the mixing member in question to be mixed therein with the compressed gas supplied to the conduit 5 through the inlet port [2 and the compressed gas conduit [9, to form whipped cream.

After the discharge cock I closed the. liquid left in the mixing member 6 will have. the tende. ency to flow back. This is, however, prevented by the non-return valves 8 and H, so that the; narrow inlet port [2, having a diameter oi the order of magnitude of 0.5 mm, 'is protected; from becoming clogged up.

In Figs. 2, 3 and 4 it is shown that eaeh mpg ing member comprises a holder body Hewitt! $3510:

hollow branches 2! and 22, interconnected by a, passage 23, which passage caribe'closgd; bga va ve, 1. In each of the branches a core 6 and Barespectively fitting therein is located. cores 6 and 6a are externally ip'rovided with intersectinamelt nl o t n t ght asset thread.

pithe ax h rintb of r ac ng ebannols 14 s t modh re 6; ha i n e ment r isosw in n axia bo e; Z hi h e-. d a pa asesezfi communicates. wi h. he. abyrtinth ife Qhannels, 24-. pizqv ded n. h oute compile s i.- he core 6. T equ d. an as supp i d. o t e esse oi he appara s. s ogcela intothe labyt'mih formed by. t emai i ged es ot iathe bore 25. he; passa es -26 and neon passi throu h. t... aby zi the eas -1 d. mandate intimately aked. mix ng. is. continued. it necessary, upon the mixture passi: the; core 61 which to hat-eadha itsquten s e m vided with a corresponding labyrinth of channels;

lif owing to. the. aopar tusbsi g out. o per tion for a prolonged period of time the inlebpopt jeopardizin the c ntest. cessat onf he. apn ratus. itis possible to-relieye; the pnessure izgqthe duo-t lnpbetwe r. cl gg sie n ot po t. and. the. onr iei r i. elte hit mem r es. he scr w. cap I4, 50 as to enable the compressed gas oven r in ents tqahout 6;-atm., to; 1 m 5 ba hiet port 152.. p g x .Shou q t ;-n .t;- poceed,,the inlet mmcalnrbg alga-2 d i" sai s 1? a needle tot -intim ted. ni Qv h i ga e 5. from, the. o tsi es the eakdowng aiised bathe. inlet port 1 gets clogged up it can be put into operation again in the same quick and simple manner.

As a result of the efficient manner in which the inlet port of the compressed gas conduit can be cleaned if it should become clogged after all, the important advantage is obtained moreover that more than one mixing membercan be connected to. the same ascendin pipe and the. compressed gas conduit discharging therein, whereby a considerable simplification relative to the known apar atus of the type in question can be obtained, withoutthe ri'slg-eff-break-downs being increased thereby. I

appears from the drawing the mixing membflis.=8.-are provided with helical left-handed and ri htan d gro ve "Ihe 'leithanded' grooves can difler in number and/or in pitch from the right-handed grooves.

Thus,- the resistance of the mixing members is kept as small as possible, While the mixing action is optimal- I claim:

1.1m apparatus. to; xin and d iverin a team substance such. asfwhippfidl cream com.- prrilsin a closed vessel. omp sed. as su nl'il p pe s ha ing. into. said. vesseL, an. ascendin vertical pipe. for the. quid contained in. saidv ssel which. reaches appnoximat lyto, the. bottom of said v ss L. a. duct. inter onnecting said venticah ip and a. mixin m mber withan associated. is har e. cock. a, conduit. with. a. restricted; inlet.- portinterconneoiing. thelinner pac 0i thevessel above. its,liquid= contents and the. said. duct. a non-return valve in the vertically. ..p1'a ced, ,pipe near its. lower end. nda nonrreiurn; vaive'in the onduit. between. its. restricted inlet, port and its d schatge. end,

2. An apparatus. claim '1 comprising. a. chamberik .pnnti'onjmline witnand' connected to thefiriltpmt ff. the saidv conduit at; apl'ace. between 'said'inlet port and the non-return valve. within. aid. conduit, said. ch mber-"lik p tion being. o ss blefmm the. outside y. removin a n m yahle plug.

nmnatus. s cla comprisin a plural. y iqmixirie m mberszeach w'ithgan assofi'e fi fld' Qi lll gfi. QQCK and each. connected'to the Said/duct.

EEQN-ARDUS "BERN RDiNt-Ts' HEESEEI;

References ented inthe file oftliis patent UNITED SLDAIES. BATENIS. Number Name;- flaw:-

lyifilgdiifia (aampanella we. mm-i5; 192%? 231, 13,306; Barman...- m. u, a-.. June-1, 33: E'GREIGNPAIENTS' Number; Coun ry, Date.

49QAB6- Great Britain:- -M. Angola, ,1938i 

